Watchdog Delay & Feed:
WPI Robotics->Utilities->Watchdog->Delay & Feed
If you are ever looking for a VI or function and know part of its name, you can right click on the diagram for the function palette and select the magnifying glass to search by name for a function or VI.
Also, you might search for other autonomous examples. Here's one thread (I can't vouch for its ability however)
http://www.chiefdelphi.com/forums/showthread.php?t=73238&highlight=autonomous+exampl e
If you want to randomize things, you probably will want to make use of the Random Number [0-1] function found in the numeric palette (it looks like a pair of dice). For instance, if you wanted to randomize a left turn or a right turn, you could generate a random number with the dice and turn right if the number is above 0.5 and left if below.